Features: Ensure clean and healthy indoor air with our 4 in 1 CO2 infrared detector, featuring high precisions measurements and a compact design. Our CO2 infrared detector is equipped with advanced infrared detection technology, providing accurate readings of CO2 concentration, temperature, and humidity. Perfect for professionals such as engineers and environmental monitors, our detector helps assess and improve indoor air quality. Perfect for various settings including offices, schools, and hotels, our detector ensures comfortable and healthy working environments. Take control of your indoor air quality with our portable and versatile CO2 infrared detector, offering real time monitoring and data analysis. Specifications: Material: ABS Color: Black Voltage: 3.7V Measurement Ranges: 400PPM-5000PPM Battery Capacity: 2000mAh Size: Approx. 4.13x1.89x3.27inch(10.5x4.8x8.3cm) Package Includes: 1x Carbon Dioxide Detector note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.